EP 1534630 B1 20060426 - METHOD FOR THE PRODUCTION OF AN AQUEOUS HYDROXYLAMINE SOLUTION
Title (en)
METHOD FOR THE PRODUCTION OF AN AQUEOUS HYDROXYLAMINE SOLUTION
Title (de)
VERFAHREN ZUR HERSTELLUNG EINER WÄSSRIGEN LÖSUNG VON HYDROXYLAMIN
Title (fr)
PROCEDE POUR REALISER UNE SOLUTION AQUEUSE D'HYDROXYLAMINE
Publication
Application
Priority
- DE 2004000301 W 20040213
- DE 10314492 A 20030327
Abstract (en)
[origin: US7425247B2] This invention relates to a method for producing an aqueous solution of free hydroxylamine (HA) by simultaneous countercurrent treatment of a HA salt with ammonia or ammonia water, then separating the HA by distillation and reconcentrating the aqueous HA solution in a countercurrent with a stripping medium. The stripping medium used according to the invention is a mixture of steam and a non-condensable inert gas and the process temperature at a defined pressure is controlled by the quantity of non-condensable inert gas at the column inlet. The preferred non-condensable inert gas is nitrogen. This results in increased safety and a reduction in losses of the method for producing aqueous solutions of free HA.
IPC 8 full level
C01B 21/14 (2006.01); B01D 3/34 (2006.01)
CPC (source: EP KR US)
C01B 21/14 (2013.01 - KR); C01B 21/1445 (2013.01 - EP US); B01D 3/343 (2013.01 - EP US); Y10S 203/06 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004085308 A1 20041007; AT E324351 T1 20060515; CA 2501666 A1 20041007; CA 2501666 C 20081230; CN 1305758 C 20070321; CN 1701039 A 20051123; DE 10314492 A1 20041014; DE 10314492 B4 20081016; DE 502004000470 D1 20060601; DK 1534630 T3 20060828; EA 007593 B1 20061229; EA 200500557 A1 20050825; EP 1534630 A1 20050601; EP 1534630 B1 20060426; ES 2262117 T3 20061116; JP 2006515261 A 20060525; JP 4216285 B2 20090128; KR 100676587 B1 20070130; KR 20050091706 A 20050915; PT 1534630 E 20060731; UA 78150 C2 20070215; US 2006032734 A1 20060216; US 7425247 B2 20080916
DOCDB simple family (application)
DE 2004000301 W 20040213; AT 04710790 T 20040213; CA 2501666 A 20040213; CN 200480001191 A 20040213; DE 10314492 A 20030327; DE 502004000470 T 20040213; DK 04710790 T 20040213; EA 200500557 A 20040213; EP 04710790 A 20040213; ES 04710790 T 20040213; JP 2005518342 A 20040213; KR 20057008881 A 20050518; PT 04710790 T 20040213; UA 2005009129 A 20040213; US 53091705 A 20050617